Electric light fixture



April 1935- K. A. SAWIN 1,996,437

ELECTRIC LIGHT FIXTURE Filed April 18, 1953 lnvenTor. Kennefh A.Suwin b /wwkw ATTys.

Patented Apr. 2 1935 1,99'A37 UNITED STATES PATENT OF C 3 ELECTRIC LIGHT FIXTURE v Kenneth A. Sawin, Cambridge, Mass., assignor to Wheeler Reflector Company, Boston, Mass., a corporation of Massachusetts Application April 18, 1933, Serial No. 666,664

5 Claims. (Cl. 240-128) This invention relates to improvements in elecstood that the invention may be embodied in other tric light fixtures of that type which .include a forms of electric light fixtures. 1 light-diffusing and/or light-distributing member The electric, light fixture illustrated in the that encloses the electric light bulb of the fixture. drawing is of that type which comprises a head I 5 Inelectric light fixtures-of this type the light-dif of porcelain or some other insulating material '5 fusing and/or light-distributing member is frewhich supports a lamp socket 2 .adapted to carry uently carried in a holder which is pivotally a lamp.3 in usual manner.

connected to a supporting member so as to permit The head I is shown as'being secured to and the holder with the light-diifusing and/or dissuspended from a metal canopy 4 which in turn tributing member to be swung downwardly to give is secured to a supporting pipe 5, this being a 10 access'to the lamp. common construction in street-lighting fixtures When an electric light fixture of this type'is of this type. y installed it is important that the direction of In some types of lighting fixtures the bulb 3 is swing of the holder member should be such that sed in a light-distributing member d the light-diffusing Orlight-diStributing member signed to produce some special ordesired dis- 15 sustained thereby may swing free of a pole or tribution of light. Such light-distributing memany other object adjacent the fixture and this beer is indicated generally at 6 and may be in the sometimes involves a shifting of the position of form of a refractor which by its refracting charthe holder member about a vertical axis after the eristics serves to give some definite distribufixture is installed. tion of the light from the lamp 3, the character 20 In the case of an electric light fixture which is of such distribution, of course, being controlled equipped with a light distributing member deby the character of the refractor. signed to give a predetermined distribution of In some types of lighting fixtures'a light-diflight it is important that such light-distributing fusing globe such as partially indioated'at I in member should be properly positioned about the dotted lines, is emp y Which be clos s 25 vertical axis of the fixture in order to produce the e lamp 3 a d serves 10 diffuse the light desired light distribution, from. Some lighting fixtures employ both the It is one of the objects of my'present invention vlighll-(iifillsing member 1 a t-d ribu in to provide an electric light fixture of the above member 6 and otherfixtures m y h v One ly type with a novel means for supporting the holder of these elements. 30 so that it may be readily adjusted about a vertical se -C tro ing elements, whether in axis relative to the supporting body and lampthe naturev of alight-diffusing memberor a lightsupporting portion of the fixture so that a proper distributing member. are q n y Carried a positioning of the light-distributing member may w ich s hin ed o a u tab e ppo be secured without turning the fixture as a whole. y o as p rmi the holder With the light? 35 This means of adjustably supporting the holder diffusing and/or light-distributing member to be also enables said holder to be turned to bring swung downwardly to give access. to the lamp 3. the hinge into a position to permit the light-dif- Such a holder is indicatedat 8 and it is secured fusing and/or distributing member to swing free to'and supported from a supporting body 9 which 40 of a pole or other object which may be located inturn is suitably secured tothe head I, prei- 0 adjacent to the fixture. .erably through the medium of the usual inte- In order to give an understanding of the invenriorly screw-threaded sleeve or screw ring holder tion I have illustrated in the drawing a selected 10. a embodiment thereof which will now be described e ea s us a described are Ormey be '4 after which the novel features will be pointed out such as are usually found in electric light fixin the appended claims. tures of this-type. My present invention relates Fig. l is a view partly broken out showing an to a novel means of connecting the holder 8 to electric'light fixture embodying my invention; --the supporting body 9 so as to permit said holder Fig. 2 is a plan view of the holder-supporting with the light-diffusing and/or light-distributing frame with the supporting screws therefor shown member to be turned about the axis of the lamp in section. into difierent positions relative to the support- The invention is illustrated in the drawing as ing body 9 thereby providing for adjustingthe embodied in a type of electric light fixture dislight-distributing member about its axis or shiftclosed in my co-pending application, Serial No. ing the position of the hinge for the holder with- 606,935, filed April 22, 1932 but it is to be underout necessitating any change in position or ad- 55 mental stepped surface l3 formed on the under side of the supporting body 9, said annular frame I I being retained in position by means of clamping screws it. These screws extend through the e ing in the sup or ng fr me, and he heads of the screws underlie the inner edge of the supporting frame.

The frame H is formed on one side with'an' extension it to which the holder B is, piyoted, said holder having the outwardly-extending arm I! provided at its end with trunnions l8 which find a bearing in the extension 16. 1 v 1 The holder is locked in itsclosed position by means of a locking latchl'S thatis pivoted to arms 28 extending from the-frame opposite the extension l6, said latch I'll-having a locking screw 2| adapted. to engage a notchin the end of an arm 22 extending from'the holder 8: When the locking screw 2| is backed off the latch can holder 8 with the lightediffusing member and/or light-distributing member to be swungdownwardlyv about its trunnions. l8. 1:

By reason of theconstruction herein illustrated the supporting frame II: with the holder B'carried thereby can be turned about the vertical aXis of the lamp to bring the hingel8 of the holder into different angular positions asshown by the full and dotted lines Fig.- 2 for instance so that with this construction the angular position of the hinge may be adjustedaftei the fixture is installed. so that-the holder with the light-diffusing and/or lights-distributing member carried thereby may. swing 'clear of a poleor any other object which is-adjacentthe fixture. With this invention. this adjustment of the-hinge can be secured without turning theffixture. Hl on the pipe 5, an operatio'n which is likely to produce an undesirable twisting. of the wires leading to the lamp socket.

' Asstated this-construction. also provides means for readily adjusting the position f: the-lightdistributing member so as tofsecure the desired distribution of light without necessitating: any

turning of the fixture as a unit; relative. to the pipe 5, for. if after the fixture is installedit is found that the light-distributing member does not project the brighter light overthe desired area. the supporting frame H may be readily turned axially relative tothe body 9 thereby to cause the light-distributing memberto give the desiredlight distribution. 1 I

It will be understood that the refractor or lightdistributing memberis. locked inthe holder 8 so that it is prevented from having any turning movement relative tothe-holder. The provision herein described, however, for adjusting the holder permitsthe light-distributing member to-be readily adjusted into a position to give the desired light distribution.

The screws l4 not only support the holder but serve as a means for clamping the holder in its adjusted position. Whenever any adjustment of said holder is required either for the purpose of adjusting the position of the hinge or adjusting the position of the light-distributing member 6 the screws l4 may be loosened sufficiently to relieve the clamping pressure and then the supporting frame I! can be turned about its axis while still supported by the screws l4 thereby to bring said frame into the proper position. The tightening. of the screws M will serve to clamp the frame in such adjusted position.

To. manipulate the screws l4 it will be necessary to release the latch for the holder 8 and swing the holder down about its hinge I8.

I claim;

1. An electric light fixture comprising a lampsupporting head, alamp. carried by said head, a supporting'bodyalso carried. by said head, a

light-difiusing'.and/or distributing member, a holder therefor, a mountingmember to which the holder is pivoted and means connecting said mounting member to said body to permit the holder and the light-distributing member carried thereby tobe rotatively adjusted to different positions relative to. the body. be disengaged from the arm 22 thus allowing the 2. An electric light fixture comprising a lampsupporting head, a supporting body secured to .and, depending therefrom, a lamp carried by the head and situated below said body, a lightdiffusing and/or distributing member enclosing the lamp, a holder for said member, a mounting memher to which the holder is pivoted and means connecting said mounting member to said body to permit it and the light-diffusing member carried thereby to be rotatively adjusted to different angular positions relative to the body.

' 3. An electric light fixture comprising a lampsupporting head, a lamp carried thereby, a suptions relative to the body.

4. An electric light fixture comprising a lampsupporting head, a lamp carried thereby, a supporting body secured to the head, a light-distributing and/or light-diffusing member, a holder :therefon'a supporting frame towhich the holder is pivotally. connected, means to adjustably secure said. frame to said body, which means permits the frame tobe turned into. different angular positions relative to the body.

5., An electric light fixture comprising a. lampsupporting head, a lamp supported thereby, a body member carried by the head, a light-distributing: member, a holder therefor, an. annular supporting frame to which the holder is pivoted,

and; means connecting said supporting frame to the body topermit said frame to beturned into different positions about its axis.

f, KENNETH. A. SAWIN. 

